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Nuclear update: Output tops 90% with slew of returning units

Total U.S. nuclear plant availability climbed to 92.22% early June 5, up from 89.72% on June 2 but remaining below the 94.99% reported on the same day a year ago.

Working to lift total production was the return of several units, including SCANA Corp.'s V.C. Summer plant in South Carolina, which resumed full output as of early June 5, up from 30% on June 2. The unit was taken offline on April 8 for a refueling outage.

Exelon Corp.'s Braidwood 1 in Illinois, which saw output drop from full power on June 1 to 76% on June 2, also returned to 100% as of early June 5, and Xcel Energy Inc.'s Prairie Island 1 plant in Minnesota, which saw production curtailed from 54% power May 30 to 6% early May 31, increased to 100% as of early June 5.

Exelon's Clinton Power Station in Illinois, ramped to 85% as of early June 5. The unit was automatically scrammed late May 30 from 28% power. Dominion Energy Inc.'s Surry 2 reactor in Virginia was operating at 71% as of early June 5. The unit had been offline for the last month for planned seasonal work.

Also, Entergy Corp.'s Waterford 3 unit in Louisiana was pegged at 81% early June 5, up from 18% on June 2. The reactor was shut on April 15 for planned seasonal work.

On the flip side, Duke Energy Corp.'s Brunswick 2 reactor in North Carolina saw output trimmed from 100% on June 2 to 84% as of early June 5.

Tennessee Valley Authority's Watts Bar 1 unit in Tennessee was reported at 75% early June 5, down from 100% on June 2, while Ameren Corp.'s Callaway nuclear unit in Missouri was eyed at 70% early June 5, also down from 100% as of June 2.

Xcel Energy's Monticello plant in Minnesota was operating at 85% as of early June 5, dropping back from 100% on June 2.

Meanwhile, TVA's Sequoyah 2 reactor in Tennessee was offline as of early June 5. The unit had been pegged at 20% on June 2 after being recently restarted following a refueling outage that began at the end of April.

For details of U.S. nuclear power plant operations, visit our Nuclear Availability and Status and Outage pages.